1563415020 has 120 divisors (see below), whose sum is σ = 5037237744. Its totient is φ = 405627264.

The previous prime is 1563414991. The next prime is 1563415037. The reversal of 1563415020 is 205143651.

1563415020 is a `hidden beast` number, since 1 + 5 + 634 + 1 + 5 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46899 + ... + 72981.

Almost surely, 2^1563415020 is an apocalyptic number.

1563415020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1563415020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2518618872).

1563415020 is an abundant number, since it is smaller than the sum of its proper divisors (3473822724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1563415020 is a wasteful number, since it uses less digits than its factorization.

1563415020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26141 (or 26130 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1563415020 is about 39540.0432473208. The cubic root of 1563415020 is about 1160.6236786871.

Adding to 1563415020 its reverse (205143651), we get a palindrome (1768558671).

The spelling of 1563415020 in words is "one billion, five hundred sixty-three million, four hundred fifteen thousand, twenty".